Python遍历二重数组

if __name__ == '__main__':
    listM=[[1,2,3],[4,5,6],[7,8,9],['恭喜发财','一定暴富']]
    print(f'listM二重列表:{listM}')
    for i in listM:
        print (f'第{listM.index(i)+1}个:{i}',end=':')
        for j in i:
            print (j,end=' ')
        print()

最简单的遍历方法

for data in list

print data

索引：list.index(data)